In the course of a chronic middle-ear suppuration, the incus may become exfoliated or gradually disappear as the result of caries.
The stapes forms a close connection with the hammer and the incus.
With a fine hook the long leg of the incus is dislocated forwards or backwards from the stapes.
The short limb of the incus is broad at the base and tapers distally.
The middle segment becomes in mammals the incus (one of the ear-ossicles), and in birds the quadrate.
The incus, or anvil-bone, may be formed from part of Meckel's cartilage.
In the Carnivora vera the incus and stapes are small as compared with the malleus, but in the Pinnipedia they are large.
The incus is articulated, or often fused, with an outgrowth from the head of the malleus.
The ossicles of Procavia, which recall those of the Equidae, are chiefly remarkable for the small size of the body of the incus.
A variety of instruments have been described for the purpose of removal of the incus.
ear bone, 1660s, from Latin incus "anvil," from incudere "to forge with a hammer." So called by Belgian anatomist Andreas Vesalius (1514-1564).
incus in·cus (ĭng'kəs)
n. pl. in·cu·des (ĭng-kyōō'dēz)
The middle of the three ossicles in the middle ear, located between the malleus and the stapes and composed of a body and two limbs. Also called anvil.